vibrator: Add Example Implementation for HAL 1.3

Bug: 121352767
Test: Ran 'cmd vibrator' on 'cf_x86_phone'.
Change-Id: I1e59cf6e0df31a8f47ee026c0333a5d39a9cdc5a
Signed-off-by: Harpreet "Eli" Sangha <eliptus@google.com>